| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Entire enamel | Is a | True | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of cementoenamel junction | Is a | True | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of dentinoenamel junction | Is a | True | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of enamel rod | Is a | True | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Enamel prisms | Is a | False | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Turner's tooth | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta - hypoplastic autosomal dominant - local | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta - hypoplastic autosomal dominant - smooth | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta - hypoplastic autosomal dominant - rough | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta - recessive - rough | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta - hypomaturation - recessive pigmented | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta - hypomaturation - snow capped teeth | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel spur | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Hypocalcification of enamel of teeth | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intrinsic enamel discoloration of erythroblastosis fetalis | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia of undetermined etiology | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia associated with systemic disease | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia associated with radiation therapy | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia associated with ingestion of drugs | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypoplasia of undetermined etiology | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypoplasia associated with localized trauma | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypoplasia associated with local infection | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel hypomineralization | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypomineralization of undetermined etiology | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypomineralization associated with localized trauma | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 4 | 
| Localized enamel hypomineralization associated with localized infection | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypomineralization | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Dental caries associated with enamel hypomineralization | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 2 | 
| Dental caries associated with enamel hypocalcification | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 2 | 
| Primary dental caries of indeterminate origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, cervical origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, proximal smooth surface origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, nonproximal smooth surface origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, pit and fissure origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, root surface origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, multisurface origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fracture of crown of tooth, enamel only | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fracture of crown of tooth, enamel and dentin, without pulp exposure | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fracture of crown of tooth, enamel and dentin, with pulp exposure | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic enamel caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Acute enamel caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Horner's teeth | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Incipient enamel caries | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel hypoplasia | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel pearls | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Non-fluoride enamel opacities | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Dental enamel solubility | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Xeroderma, talipes and enamel defect syndrome | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Mottling of enamel | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Irradiated enamel | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Acquired discoloration of enamel associated with aging | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Acquired discoloration of enamel | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier |  | 
| Antenatal enamel hypoplasia | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Neonatal enamel hypoplasia | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Postnatal enamel hypoplasia | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Acute enamel dental caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic enamel dental caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta, hypocalcification type | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta, hypomaturation hypoplasia type with taurodontism | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 2 | 
| Amelogenesis imperfecta, hypoplastic type with microdontia | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta, pigmented hypomaturation type | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta, hypomaturation type | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta, hypoplastic type | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel-renal syndrome | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Kohlschutter's syndrome | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia associated with fluorosis | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel dental caries unspecified | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel defect as part of syndrome | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Crazing of enamel | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypomineralization associated with localized trauma | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 4 | 
| Localized enamel hypomineralization associated with localized trauma | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypomineralization associated with localized trauma | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hypocalcification of teeth | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Micro-abrasion of tooth enamel | Procedure site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Micro-abrasion of tooth enamel | Procedure site - Direct | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, cervical origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Turner's tooth | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia associated with radiation therapy | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Antenatal enamel hypoplasia | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Non-fluoride enamel opacities | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, multisurface origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Incipient enamel caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Neonatal enamel hypoplasia | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, root surface origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Mottling of enamel | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enamel pearls | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intrinsic enamel discoloration of erythroblastosis fetalis | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Postnatal enamel hypoplasia | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia associated with systemic disease | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized enamel hypoplasia associated with fluorosis | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary dental caries, pit and fissure origin | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fracture of crown of tooth, enamel and dentin, with pulp exposure | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic enamel dental caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Localized enamel hypoplasia associated with localized trauma | Finding site | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Micro-abrasion of tooth enamel | Procedure site - Direct | True | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amelogenesis imperfecta, hypoplastic type with microdontia | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hypocalcification of teeth | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic enamel caries | Finding site | False | Enamel structure | Inferred relationship | Existential restriction modifier | 1 |